BART press conference

National Transportation Safety Board lead investigator Jim Southworth updates the media on the investigation into the deaths of two BART workers at a press conference in Pleasant Hill, Calif.

National Transportation Safety Board lead investigator Jim Southworth updates the media on the investigation into the deaths of two BART workers at a press conference in Pleasant Hill, Calif. (SUSAN TRIPP POLLARD / MCT)

National Transportation Safety Board lead investigator Jim Southworth updates the media on the investigation into the deaths of two BART workers at a press conference in Pleasant Hill, Calif.SUSAN TRIPP POLLARD / MCT